145454331 has 32 divisors (see below), whose sum is σ = 217645056. Its totient is φ = 85652000.

The previous prime is 145454299. The next prime is 145454333. The reversal of 145454331 is 133454541.

It is a cyclic number.

It is not a de Polignac number, because 145454331 - 2⁵ = 145454299 is a prime.

It is a super-2 number, since 2×145454331² = 42313924813315122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145454333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295996 + ... + 296486.

It is an arithmetic number, because the mean of its divisors is an integer number (6801408).

Almost surely, 2^145454331 is an apocalyptic number.

145454331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145454331 is a deficient number, since it is larger than the sum of its proper divisors (72190725).

145454331 is a wasteful number, since it uses less digits than its factorization.

145454331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its digits is 14400, while the sum is 30.

The square root of 145454331 is about 12060.4448922915. Note that the first 3 decimals coincide. The cubic root of 145454331 is about 525.9069204043.

The spelling of 145454331 in words is "one hundred forty-five million, four hundred fifty-four thousand, three hundred thirty-one".